Carbureter.



P. UNDERWOOD.

R. S. HILL @z 0.

GARBURETBR.

' .APPLIUATIOH FILED FEB. 28, 1910.

Patentedilpr. 16, 1%.?

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United.

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but the level of the gasolene in said chamber will be substantiallyuniform at all times.

We have provided means for automatically controlling the flow of airthrough the carbureter as follows: Mounted within the carburetor abovethe gasolene distributer is a plate 25 having a comparatively large.opening 26 at its center. This plate is an ranged to slide vertically ona guide 27 which passes through an opening in the plate as shown inFig. 1. Attached to the plate 25 is an arm 28 extended downwardly andpivoted to a lever 29, which lever is fulcrumed to a support 30.Attached to the other end of the lever is an arm 31, which arm extendsupwardly and supports a secend plate 32. This latter plate is of smallerdiameter than the upper one and is provided with an opening 33 ofsmaller diameter than the opening 26. The plate 32 is preferablyprovided with guides 34 to extend up through the opening 26 and to holdsaid plates exactly in line. A guide 35 is pr0- vided for the plate 32which guide-is secured to the carbureter cylinder. We have also providedan extensible coil spring 36 designed to press upwardly upon the .plate32 to yieldingly hold it against the plate 25. WVe have provided meansfor adjusting-the lower end of the pipe 16 relative to the gasolenereceptacle so that the level of the gasolene in the chamber 14 maybekeptin line with the gasolene distributer within the carbureter asfollows: On the side of the receptacle 14 is a screw threaded sleeve 37and inserted in said sleeve is a screw threaded rod 38 which rod isrotatably mounted in a collar 39 fitted to the pipe 16 so that therotation of the rod will raise or lower the pipe relative to thereceptacle.

In practical operation and assuming that the gasolene is being fed tothe gasolene distributor in a uniform manner ready to be taken up by theair passing adjacent to it and assuming furtherthat only a comparativelyslight current of air is passing through the :arluiretcr then all of theair will be deflected by the plates 25 and 32 and will be compelled topass close to the edges of the gasolcnc distributor. Assuming furtherthat the engine with which the carlnjireter is being used producesstrong suction then an upward pressure will he created upon the largeplate 25 which will cause it to move upwardly. The lever 29 will operateto then more the plate 32 downwardly so that the said plates will assumethe positions shown in Fig. 4. When in this position the same quantityof air will be made to pass' close to the distributor through theopening in the lower plate but the major portion oi the air will passoutside of the lower plate and. be deflected inwardly toward the openingof the upper plate so that it will not come close to the distributcr. Inthis way tilt mixture is made substantially uniform under all conditionsfor the reason that when the suction of air through the carbureter iscomparatively weak it is necessary to bring all of the air close to thegasolene distributor in order to get the proper mixture, but when thesuction of air through the carburetor is extremely rapid the gasolene istaken up much more readily by the air and if all of the air werepermitted to pass close to the gasolcne the proportion of gasolene andair would be varied; that is to say, there would be too muchgasolene inproportion to the quantity of air. Hence by means of the moving plateswe' have provided for automatically regulating the mixture so that itwill operate eiliciently in connection with the engine with which thecarbureter is used both when the engine is running extremely slow andwhen running extremely fast.

' lVe claim as our invention:

1. In a carburetor, the combination of a gasolene distributor, meanstorsupplying gasolene to it, two plates zujljacentto the distributor, eachhaving an opening through its central portion and means for jointlymoving said plates toward and from each other, the lower plate bcing ofsmaller diameter than the upper one so that air may pass around thesides of it and through the opening in. the upper plate when the platesare separated.

2. In a carburcter, the combination of a gasolene distributor, means forsupplying gasolene to it, two plates adjacent to the distributor, eachhaving an opening through its central portion, means for jointly movingsaid plates toward and from each other, the lower plate being of smallerdiameter than the upper one so that air may pass around the sides of itand through the openingin the upper plate when the plates are separated,and means for automatically" moving said plates upon the pressure of airflowing through the carbureter and engaging the upperplate.

3. In a carburetor, the combination of a gasolene distributor, means forsupplying gasolenc to it, two plates adjacent to the distributer, eachhaving an opening through its central portion, meansfor jointly movingsaid plates toward and from each. other, the lower plate being ofsmaller diameter than the upper one so that air may pass around thesides of it and through the open-- ing in the upper plate when theplates are separated, means tor automatically moving said plates uponthe pressure of air flowing through the carburetor and engaging theupper plate, and a spring for normallyholth. iiig the plates in positionadjacent to each other. i

a. In a carburetor, the combination of a gasolene distrihutcr, means forsupplying gasolene to it, a plate above the gasolene chstrlhuter hovlngan openlng 111 Its central portlon and hevmg 1ts sldes fitted close tothe interior of the earbureter a second plate below it of smallerdiameter and having an opening through its center surrounding thegasolene clistributer, guides fixed to the lower plate and extendedupwardly through the opening in the upper plate, arms fixed to bothplates and extended clownwertly, a lever fulcrumed at its centralportion, and [ill'OUZd to said arms, said parts being so nrrzu'lged thatwhen the plates are adjacent to each other all of the air passingthrough the carburetor Will pass through the open ing in the lower plateand close to the gasolene distributer and when the plates are separateda portion of the air will flow through the spaces between the plates;

Des Moines, Iowa, Feb. 22, 1910.

RAYMUND S: HILL.

OLIVER P, UNDERWOOD. Withesses:

' htlAR WALLACE,

A. G. HAGUE.

